Statistics for occurrence #1 of “Messrs. Porter” in chapter 15.60 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

... under water beyond the shield were given, and both approved it. As the drawings were in pencil, the secretary directed me to make a clean drawing in ink of the plan, to be filed in the department. Messrs. Porter and Williamson were directed to ascertain if suitable engines and boilers could be obtained. Mr. Porter offered to make the clean drawing, as being more familiar with that sort of work. Acceptin...
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